YIO-540-D4A5 from Vans and the Hartzell 3-blade composite Semitar prop:
Out of the box, it was .092 In/S using a MicroVibII.
Was so small that we didn't try to improve it as the stock flywheels from Vans no longer have holes to be able to use to add weight. So would require removing flywheel and having it machined.
http://myrv10factory.wordpress.com/2013/09/09/flight-testing-continues/
First run said add 24 grams - drilled the back-plate and added washers and a nut and bolt. Second run said add 5 grams- large washer under a spinner screw. Third run we were down to .04, needed a wee bit at 9:00 - added a small washer under another of the spinner bolts. Fourth run said we were .01 - leave it alone!
Runs smooooth.